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Undefined function 'mtimes' for input arguments of type 'matlab.gr​aphics.cha​rt.primiti​ve.Histogr​am'.

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Ceren yüksel
Ceren yüksel 2021-12-20
评论： Ceren yüksel 2021-12-21
My code gives error in last line, I could not find why,
Please help me!
Undefined function 'mtimes' for input arguments of type 'matlab.graphics.chart.primitive.Histogram'.
Error in a_mutual_information_64 (line 32)
s(i,j)= H(i,j)*(log2(H(i,j)/(h1(i)*h2(j))));
[Org, map1] = dicomread("ad-talarich\a4\ADNI_131_S_0497_PT_Talairach_Warped_Br_20080307132607768_3_S15907_I95832.dcm")
[Ref, map2] = dicomread('cn-talararich\a97\ADNI_005_S_0610_PT_Talairach_Warped_Br_20080306090318595_2_S17355_I95406.dcm')
a = double(Org);
b = double(Ref);
%a = Org(:);
%b = Ref(:);
n = length(a);
H = zeros(25600,25600);
for i = 1:n
x = a(i);
y = b(i);
H(x+1,y+1) = H(x+1,y+1) + 1 ;
end
h1 = histogram(a/n);
h2 = histogram(b/n);
s = zeros(64,64);
H = H/n;
for i = 1: 64
for j = 1:64
if H(i,j) == 0 || h1(i) == 0 || h2(j) == 0
s(i,j) = 0;
else
s(i,j)= H(i,j)*(log2(H(i,j)/(h1(i)*h2(j))));
end
end
end

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采纳的回答

Voss
Voss 2021-12-20
Right now, h1 and h2 are Histogram objects, and it doesn't make sense to multiply two histogram objects. This is what the error message is saying.
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